I am using Android Studio 2.2 Preview. I am facing the issue
Failure: Install failed invalid apk
Error: While installing apk,
For Xiaomi mobile
1.Setting=>About phone=>tap 7 times on MIUI version
2.Setting=>Developer options=> Developer options (ON)
=> USB Debugging (ON)
=> Install via USB(ON)
Install via USB
if
enable to ON then
Disable WiFi and switch install via USB on while you are connected through mobile data and under your xiaomi account. It works!